<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row :gutter="10">
        <el-col :span="6">
          <el-button type="primary" @click="addDialogVisible =true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1,i1) in scope.row.children" :key= 'item1.id'>
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag type="primary" closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="30%" @close="addDialogClosed">
  <!-- 内容主体区域 -->
<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
  <el-form-item label="角色名称" prop="roleName">
    <el-input v-model="addForm.roleName"></el-input>
  </el-form-item>
    <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model="addForm.roleDesc"></el-input>
  </el-form-item>
</el-form>
  <!-- 底部区域 -->
  <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRole">确 定</el-button>
  </span>
</el-dialog>
            <!-- 修改角色 -->
            <el-dialog title="修改角色信息" :visible.sync="editDialogVisible"  width="50%" @close="editDialogClosed">
  <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
    <el-form-item label="角色名称" prop="roleName">
    <el-input v-model="editForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model="editForm.roleDesc"></el-input>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRoleInfo">确 定</el-button>
  </span>
</el-dialog>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightList" :props="treeProps" :default-checked-keys="defKeys"
  show-checkbox node-key="id"
  default-expand-all ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    return {
      // 所有角色列表
      roleList: [],
      // 控制添加对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则
      addFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '角色名称长度在 3 到 10 个字符', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 3, max: 10, message: '角色描述长度在 6 到 10 个字符', trigger: 'blur' }]
      },
      // 控制修改用户对话框
      editDialogVisible: false,
      // 查询到的角色信息对象
      editForm: {
        roleName: '',
        roleDesc: ''
      },
      editFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
      },
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值
      defKeys: [],
      // 当前即将分配权限的id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
    },
    // 监听添加角色对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮添加新角色
    addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 200) {
          this.$message.error('添加角色失败!')
        }
        this.$message.success('添加角色成功！')
        // 隐藏添加角色的对话框
        this.addDialogVisible = false
        this.getRolesList()
      })
    },
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    editRoleInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改角色信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新角色列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功')
      })
    },
    // 删除角色
    async removeRoleById (id) {
      // 询问用户是否删除信息
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch((err) => err)
      // 如果用户确认了删除，则返回值为 字符串 confirm
      // 如果用户取消了删除，则返回值为 字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 获取到的权限数据保存到data中
      this.rightList = res.data
      // 递归获取三级节点的Id
      this.getleafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 这是通过递归的形式获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getleafKeys (node, arr) {
      // 如果当前node 节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getleafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less">
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
